Anemia is when your blood has too few red blood cells. Having too few red blood cells makes it harder for your blood to carry oxygen or iron. This can affect how cells work in nerves and muscles. During pregnancy, your baby also needs your blood....more

Pre-existing heart disease is a heart problem that you had before you got pregnant. This usually means a heart condition that you were born with (congenital). These can include heart problems that may have been fixed. It can also include heart valve issues....more

Sickle cell disease is an inherited blood disorder that is present at birth. Children with SCD make an abnormal type of hemoglobin. This is the protein in red blood cells that carries oxygen to all parts of the body....more